<template>
  <div class="app-container">
    <el-form :model="queryParams" ref="queryForm" size="small" :inline="true" v-show="showSearch" label-width="68px">
      <el-form-item label="课程名字" prop="courseName">
        <el-input
            v-model="queryParams.courseName"
            placeholder="请输入课程名字"
            clearable
            @keyup.enter.native="handleQuery"
        />
      </el-form-item>
      <el-form-item label="课程描述" prop="courseDesc">
        <el-input
            v-model="queryParams.courseDesc"
            placeholder="请输入课程描述"
            clearable
            @keyup.enter.native="handleQuery"
        />
      </el-form-item>
      <el-form-item label="课程封面" prop="courseCoverColor">
        <el-input
            v-model="queryParams.courseCoverColor"
            placeholder="请输入课程封面"
            clearable
            @keyup.enter.native="handleQuery"
        />
      </el-form-item>
      <el-form-item>
        <el-button type="primary" icon="el-icon-search" size="mini" @click="handleQuery">搜索</el-button>
        <el-button icon="el-icon-refresh" size="mini" @click="resetQuery">重置</el-button>
      </el-form-item>
    </el-form>

    <el-row :gutter="10" class="mb8">
      <el-col :span="1.5">
        <el-button
            type="primary"
            plain
            icon="Plus"
            size="mini"
            @click="handleAdd"
            v-hasPermi="['system:course:add']"
        >新增
        </el-button>
      </el-col>
      <el-col :span="1.5">
        <el-button
            type="success"
            plain
            icon="Edit"
            size="mini"
            :disabled="single"
            @click="handleUpdate"
            v-hasPermi="['system:course:edit']"
        >修改
        </el-button>
      </el-col>
      <el-col :span="1.5">
        <el-button
            type="danger"
            plain
            icon="Delete"
            size="mini"
            :disabled="multiple"
            @click="handleDelete"
            v-hasPermi="['system:course:remove']"
        >删除
        </el-button>
      </el-col>
      <el-col :span="1.5">
        <el-button
            type="warning"
            plain
            icon="Download"
            size="mini"
            @click="handleExport"
            v-hasPermi="['system:course:export']"
        >导出
        </el-button>
      </el-col>
      <right-toolbar :showSearch.sync="showSearch" @queryTable="getList"></right-toolbar>
    </el-row>

    <el-table v-loading="loading" :data="courseList" highlight-current-row>
      <el-table-column type="selection" width="55" align="center"/>
      <el-table-column label="课程id" align="center" prop="courseId"/>
      <el-table-column label="课程名字" align="center" prop="courseName"/>
      <el-table-column label="章节数" align="center" prop="chapterNum"/>
      <el-table-column label="课程描述" align="center" prop="courseDesc"/>
      <el-table-column label="课程封面" align="center" prop="courseCoverColor">
        <template #default="scope">
          <img class="cover-image" :src="scope.row.courseCoverColor"/>
        </template>
      </el-table-column>
      <el-table-column label="操作" align="center" class-name="small-padding fixed-width">
        <template #default="scope">
          <el-tooltip content="修改" placement="top">
            <el-button link type="primary" icon="Edit" @click="handleUpdate(scope.row)"></el-button>
          </el-tooltip>
          <el-tooltip content="删除" placement="top">
            <el-button link type="primary" icon="Delete" @click="handleDelete(scope.row)"></el-button>
          </el-tooltip>
          <el-tooltip content="增加章节" placement="top">
            <el-button link type="primary" icon="Plus" @click="openChapter(scope.row)"></el-button>
          </el-tooltip>
          <el-tooltip content="查看章节" placement="top">
            <el-button link type="primary" icon="View" @click="viewChapterList(scope.row)"></el-button>
          </el-tooltip>
        </template>
      </el-table-column>
    </el-table>

    <pagination
        v-show="total>0"
        :total="total"
        :page.sync="queryParams.pageNum"
        :limit.sync="queryParams.pageSize"
        @pagination="getList"
    />

    <!-- 添加或修改课程对话框 -->
    <el-dialog :title="title" v-model="open" width="500px" append-to-body>
      <el-form ref="form" :model="form" :rules="rules" label-width="80px">
        <el-form-item label="课程名字" prop="courseName">
          <el-input v-model="form.courseName" placeholder="请输入课程名字"/>
        </el-form-item>
        <el-form-item label="课程描述" prop="courseDesc">
          <el-input v-model="form.courseDesc" placeholder="请输入课程描述"/>
        </el-form-item>

        <el-popover
            placement="bottom"
            title="Title"
            :width="600"
            trigger="hover"
            @before-enter="popoverData"
        >
          <template #default>
                <el-row :gutter="20">
                  <el-col :style="{backgroundColor: currentImgIndex == index ? '#289C38' : '#fff'}" @click="clickSingleImage(item,index)" v-for="(item,index) in imageList" :span="8">
                    <div style="display: flex;flex-direction: column;align-items: center">
                      <img class="cover-image" :src="item.url" alt="">
                      <div>{{item.coverName}}</div>
                    </div>
                  </el-col>
                </el-row>
          </template>


          <template #reference>
            <el-form-item label="课程封面" prop="courseCoverColor">
<!--              <el-input v-model="form.courseCoverColor" placeholder="请输入课程封面"/>-->
              <img v-if="form.courseCoverColor" class="cover-image" :src="form.courseCoverColor" alt="">
              <div v-else>
                <el-button link type="primary" icon="Plus">添加封面图</el-button>
              </div>
            </el-form-item>

          </template>
        </el-popover>


      </el-form>
      <div slot="footer" class="dialog-footer">
        <el-button type="primary" @click="submitForm">确 定</el-button>
        <el-button @click="cancel">取 消</el-button>
      </div>
    </el-dialog>


    <!-- 为课程增加章节弹窗 -->
    <el-dialog :title="title" v-model="isAddChapterShow" width="500px" append-to-body>
      <el-form ref="form" :model="form" :rules="rules" label-width="80px">
        <el-form-item label="章节名称" prop="courseName">
          <el-input v-model="chapterForm.chapterName" placeholder="请输入课程名字"/>
        </el-form-item>
        <el-form-item label="章节描述" prop="courseDesc">
          <el-input v-model="chapterForm.chapterDesc" placeholder="请输入课程描述"/>
        </el-form-item>
        <el-form-item label="所属课程" prop="courseCoverColor">
          <el-input v-model="chapterForm.courseId" placeholder="请输入课程封面颜色"/>
        </el-form-item>
      </el-form>
      <div slot="footer" class="dialog-footer">
        <el-button type="primary" @click="addChapter">确 定</el-button>
        <el-button @click="isAddChapterShow = false">取 消</el-button>
      </div>
    </el-dialog>


    <!-- 查看章节 -->
    <el-dialog :title="title" v-model="isViewChapter" append-to-body>
      <el-table v-loading="loading" :data="chapterList" @selection-change="handleSelectionChange">
        <el-table-column type="selection" width="55" align="center"/>
        <el-table-column label="章节id" align="center" prop="chapterId"/>
        <el-table-column label="章节名字" align="center" prop="chapterName"/>
        <el-table-column label="章节描述" align="center" prop="chapterDesc"/>
        <el-table-column label="课程id" align="center" prop="courseId"/>
        <el-table-column label="操作" align="center" class-name="small-padding fixed-width">
          <template #default="scope">
            <el-button
                size="mini"
                type="text"
                icon="el-icon-edit"
                @click="handleUpdate(scope.row)"
                v-hasPermi="['system:chapter:edit']"
            >修改
            </el-button>
            <el-button
                size="mini"
                type="text"
                icon="el-icon-delete"
                @click="handleDelete(scope.row)"
                v-hasPermi="['system:chapter:remove']"
            >删除
            </el-button>
          </template>
        </el-table-column>
      </el-table>
      <div slot="footer" class="dialog-footer">
        <el-button type="primary" @click="addChapter">确 定</el-button>
        <el-button @click="isAddChapterShow = false">取 消</el-button>
      </div>
    </el-dialog>
  </div>
</template>

<script>
import {listCourse, getCourse, delCourse, addCourse, updateCourse} from "@/api/system/course";
import {addChapter, listChapter} from "@/api/system/chapter.js";
import { listImage } from "@/api/system/image";

export default {
  name: "Course",
  data() {
    return {
      // 遮罩层
      loading: true,
      // 选中数组
      ids: [],
      // 非单个禁用
      single: true,
      // 非多个禁用
      multiple: true,
      // 显示搜索条件
      showSearch: true,
      // 总条数
      total: 0,
      // 课程表格数据
      courseList: [],
      // 弹出层标题
      title: "",
      // 是否显示弹出层
      open: false,
      // 查询参数
      queryParams: {
        pageNum: 1,
        pageSize: 10,
        courseName: null,
        courseDesc: null,
        courseCoverColor: null,
      },
      // 表单参数
      form: {},
      // 表单校验
      rules: {
        createTime: [
          {required: true, message: "创建时间不能为空", trigger: "blur"}
        ],
        updateTime: [
          {required: true, message: "更新时间不能为空", trigger: "blur"}
        ]
      },
      isAddChapterShow: false, //添加章节弹窗
      chapterForm: {
        chapterName: "",
        chapterDesc: "",
        courseId: ""
      },
      isViewChapter: false, //查看章节
      chapterList: [], //章节列表
      imageList:[], //封面图列表
      currentImgIndex:null //选中的封面图的序号
    };
  },

  created() {
    this.getList();
  },
  methods: {
    /** 查询课程列表 */
    getList() {
      this.loading = true;
      listCourse(this.queryParams).then(response => {
        this.courseList = response.rows;
        this.total = response.total;
        this.loading = false;
      });
    },
    // 取消按钮
    cancel() {
      this.open = false;
      this.reset();
    },
    // 表单重置
    reset() {
      this.form = {
        courseId: null,
        courseName: null,
        courseDesc: null,
        courseCoverColor: null,
        createTime: null,
        updateTime: null
      };
      this.resetForm("form");
    },
    /** 搜索按钮操作 */
    handleQuery() {
      this.queryParams.pageNum = 1;
      this.getList();
    },
    /** 重置按钮操作 */
    resetQuery() {
      this.resetForm("queryForm");
      this.handleQuery();
    },
    // 多选框选中数据
    handleSelectionChange(selection) {
      this.ids = selection.map(item => item.courseId)
      this.single = selection.length !== 1
      this.multiple = !selection.length
    },
    /** 新增按钮操作 */
    handleAdd() {
      this.reset();
      this.open = true;
      this.title = "添加课程";
    },
    /** 修改按钮操作 */
    handleUpdate(row) {
      this.reset();
      const courseId = row.courseId || this.ids
      getCourse(courseId).then(response => {
        this.form = response.data;
        this.open = true;
        this.title = "修改课程";
      });
    },
    /** 提交按钮 */
    submitForm() {
      this.$refs["form"].validate(valid => {
        if (valid) {
          if (this.form.courseId != null) {
            updateCourse(this.form).then(response => {
              this.$modal.msgSuccess("修改成功");
              this.open = false;
              this.getList();
            });
          } else {
            addCourse(this.form).then(response => {
              this.$modal.msgSuccess("新增成功");
              this.open = false;
              this.getList();
            });
          }
        }
      });
    },
    /** 删除按钮操作 */
    handleDelete(row) {
      const courseIds = row.courseId || this.ids;
      this.$modal.confirm('是否确认删除课程编号为"' + courseIds + '"的数据项？').then(function () {
        return delCourse(courseIds);
      }).then(() => {
        this.getList();
        this.$modal.msgSuccess("删除成功");
      }).catch(() => {
      });
    },
    /** 导出按钮操作 */
    handleExport() {
      this.download('system/course/export', {
        ...this.queryParams
      }, `course_${new Date().getTime()}.xlsx`)
    },


    async addChapter() {
      let res = await addChapter(this.chapterForm)
      console.log(res)
    },

    openChapter(row) {
      this.chapterForm.courseId = row.courseId
      this.isAddChapterShow = true
    },

    async viewChapterList(row) {
      this.chapterForm.courseId = row.courseId
      this.$router.push({
        path: "/course/chapter",
        query: {
          courseId: row.courseId
        }
      })
    },


    handleCurrentChange(e) {
      console.log(e, "选中行")
      this.$router.push({
        path: "/course/chapter",
        query: {
          courseId: e.courseId
        }
      })
    },

    getListImage() {
      this.loading = true;
      listImage().then(response => {
        this.imageList = response.rows;
        this.loading = false;
      });
    },

    //显示气泡卡片前面获取封面图片列表
    popoverData(){
      this.getListImage()
    },


    //点击单个封面
    clickSingleImage(item,index){
      this.currentImgIndex = index
      this.form.courseCoverColor = item.url
    }


  }
};
</script>

<style scoped>
.cover-image{
  width: 8vw;
  height: 23vh;
  object-fit:cover;
}
</style>

